Saw-swage.



Patented Dec. 1, 1914.

a 2 i 1* wg/z M w G. H. NAULTY.

SAW SWAGB. APPLIOATION FILED we. 22 1912.

CHARLESI-I. NAULTY, 0F JAMESTOWN; MISSISSIPPI.

saw-swede.

Specification of Letters Patent. Patented 1 1914;,

Application filed August 23, 1912. Serial No. 716,689.

To all whom it may concern Be itknown that I, CHARLES H. NAULTY, acitizen of the United States, residing at Jamestown, in the county ofMarion and State of Mississippi, have invented new and usefulImprovements in Saw-Swages, of which the following is a specification.

This invention relates to saw s'waging devices, the object in viewbeingto provide a simple, practical, and cheap swage for operating uponthe raker teeth of a cross-cut saw, in such manner as to perfectly swagethe point of the tooth, without any danger whatever of injuring orimproperly shaping the teeth.

With the hand saw, as with the cutting teeth of cross cut saws, thesetting'consists of deflecting the teeth laterally from one side to theother of the median lines so that the teeth will cut a wider kerf' thanthe thickness of the blade and thereby prevent binding. This setting ofthe teeth of hand saws and the cutting teeth of cross cut saws isdetermined by the work in hand; the teeth requiring a greater set foruse in soft wood than in hard wood. It is believed by your petitioner tobe an entirely new idea to set raker teeth during the operation ofswaging or in fact at any other time. The object in swaging the rakerteeth is to widen the point of the tooth so that it will clear the kerfequal to the width cut by the cutting teeth. After the tooth has beenswaged it is filed to sharpen the same. Unless the tooth is set byelevating its point or points so that they are in a plane with the pointof the cutting teeth there is no latitude allowed for sharpening thetooth. In other words, when the tooth is swaged it is not only broadenedbut partially shortened and unless its point is elevated so as to allowsuflicient latitude for sharpening the point of the tooth will be toolow with relation to the point of the cutting teeth to perform itsproper function in clearing the kerf.

In hard wood the raker teeth should be approximately one-hundredth of aninch shorter than the cutting teeth and from this relative differencethere should be a change of only a thirty-second of an inch for thesoftest kind of wood. Now, when the cutting teeth are filed and theraker teeth swaged to correspond therewith they are frequently too lowto permit of any filing or after filing are found to be too low toperform their function. Further swaging does no good and the only methodknown to your petitioner-is by raising the point of the tooth.Applicants'tool-is designed especially for this purpose which thisinvention has for its object.

1 With the above and other objects in view, the invention consists inthe construction, combination and arrangement of parts, as will behereinafter more fully described, illustrated in. the accompanyingdrawings, and pointed out pended.

In the drawings: Figure I is a side elevation of a saw swage,embodyingthe present invention. Fig.- 2 is a longitudinal section, alsoshowing one of the raker teeth of a cross-cut saw in connectiontherewith. The saw swaging device contemplated in this inventioncomprises essentially a shank 1, a die 2,-a gage 3, and a, dieconiiningor retaining device 4:. I

The shank 1 which may be of any suitable length is provided at its loweror striking end with a longitudinally extending edge gage 3, andadjacent to the point ofjun'ction of the gage 3 with the shank 1 arecess 5 is formed, which terminates in an abrupt upper shoulder or wall6, against which the upper end of the die 2 abuts, as clearly illus- Thelower face of trated in the drawings. the die is beveled and slightlycurved, as shown at 7, and the upper portion of the face of the lateraledge gage 3 is also beveled on a curve, as shown at 8, there beingformed in this way, between the gage and the die, a converging andlaterally deflected space, in which the rakertooth is adapted to beforced when a blow is struck upon the outer or upper end of the shank.The die 2 is retained in position by means of a sleeve 4 which embracesboth the die and the shank and a portion of the lateral edge gage 3, asclearly shown in Fig. 2.

' In the preferred embodiment of this invention, the portion of theshank in which the die is arranged is square in cross section, and thesleeve 4 is of the same shape in cross section, so as to securely holdthe die in place, and it is also preferred to permanently sweat thesleeve 4 in place, so as to prevent any possibility of the same workingloose, during the operation of the swaging device. However, when the diebecomes worn, or. it is desired to substitute a die of in the claimhereunto apslightly difierent shape, the sleeve 4 may be loosened andslid back, and a new die substituted.

The device as a whole will preferably be made out of tool steel, and theupper end of the shank will be hardened, as also the die, and thelateral edge gage 3. All of the parts 1, 2, 3 and 4 bear a fixedrelation to each other.

In swaging one of the raker teeth, the device is placed over theextremity of the tooth, as illustrated in Fig. 2, and a light blow froma mallet or hammer is sufficient to cause the tooth to be jam'bed intothe space between the die and edge gage, there by imparting to the pointof the tooth the necessary pitch or angularity to produce the desiredresults. Furthermore, each of the raker teeth is correspondingly anduniformly swaged by a single operation.

All raker teeth merge into the body of the saw on an. arc and the shanko-fapplicants tool is provided with an extension having a cam on thecurved end which when engaged with this are or curve forces theextension away from themedian line otthe' tooth, thereby forcing theupper end of the shank toward the medianlinesand raising the point ofthe tooth asit is .swaged. The tool is not adapted to setting thecutting teeth laterally but only adapted to swage and set the points ofrake/r teethby elevating them. While this elevation is only in a maximuminstance about a sixty-fourth of an inch it is sulficient to allowfiling without lowering thepoints of the teeth to such a degree thatthey would be inoperative for clearing thekerf of the saw-dust andraising the chips separated by the cutting teeth.

What is claimed is:

saw swage comprising a handle, a shoulder being formed upon said handle,a reduced extension being formed upon said handle, said extension beingformed with a surface at right angles to said shoulder at the inner endof said extension, said extension being formed with a rounded portionmerging with said aforenamed surface, a swage block arranged to bearagainst said shoulder and said surface rightangular to it so as to beflush with theedge of the ban dle, said block being formed with arounded edge flaring away from and having a similar point oi origin withsaid rounded por tion of said extension, and a securing sleeve mountedon said handle and engaging the effective length of said block to holdit in position.

Intestimony whereof I affix my signature in presence of two witnesses.

CHAS. H. NAULTY. Witnesses M. D. THOMASON, K. E. ANDERSON.

Copies of thls,patent may .be:obtaimedflfor five eents each, byaddressing the "Commissioner of Eat-eats, Washington, I). 0.

